Jiangnan in the context of "Huangjiu"

The Yangtze Delta or Yangtze River Delta (YRD), once known as the Shanghai Economic Zone, is a megalopolis generally comprising most parts of Shanghai, southern Jiangsu, northern Zhejiang, and southern Anhui. The area lies in the heart of the Jiangnan region (literally meaning "south of the Yangtze"), where the Yangtze drains into the East China Sea. Historically, the fertile delta fed much of China's population, allowing cities and commerce to flourish. Today, it is one of China's most important metropolitan areas and is home to China's financial center, as well being as a tourist destination and a hub for manufacturing ranging from textile to automaking. In 2024, the Yangtze Delta had a GDP of approximately US$4.7 trillion (about the same size as Germany).

The urban buildup in the area has given rise to what may be the largest concentration of adjacent metropolitan areas in the world. It covers 350,000 km (140,000 sq mi) and is home to over 240 million people, about a sixth of China's population. With a fourth of the country's GDP, the YRD is one of the fastest growing and richest regions in East Asia.

Wu (Chinese: 吳; pinyin: Wú; Middle Chinese *ŋuo < Eastern Han Chinese: *ŋuɑ), known in historiography as Eastern Wu or Sun Wu, was a dynastic state of China and one of the three major states that competed for supremacy over China during the Three Kingdoms period. It previously existed from 220 to 222 as a vassal kingdom nominally under its rival state Cao Wei but declared complete independence in November 222. It was elevated to an empire in May 229 after its founding ruler Sun Quan (Emperor Da) declared himself emperor.

The name Wu was derived from the place it was based in—the Jiangnan (Yangtze River Delta) region, which was also historically known as Wu. It was called Dong Wu ("Eastern Wu") or Sun Wu by historians to distinguish it from other Chinese historical states with similar names in that region, such as the Wu state of the Spring and Autumn period and the Wuyue kingdom of the Five Dynasties and Ten Kingdoms period. It was called Eastern Wu because it occupied most of eastern China in the Three Kingdoms period, and Sun Wu because the family name of its rulers was Sun.

Sun Quan (pronunciation; 182 – 21 May 252), courtesy name Zhongmou (仲謀), posthumously known as Emperor Da of Wu, was the founder of Eastern Wu, one of the Three Kingdoms of China. He inherited control of the warlord regime established by his elder brother, Sun Ce, in 200. He declared formal independence and ruled from November 222 to May 229 as the King of Wu and from May 229 to May 252 as the Emperor of Wu. Unlike his rivals Cao Cao and Liu Bei, Sun Quan was much younger and governed his state mostly separate of politics and ideology. He is sometimes portrayed as neutral considering he adopted a flexible foreign policy between his two rivals with the goal of pursuing the greatest interests for the country.

Sun Quan was born while his father Sun Jian served as the adjutant of Xiapi County. After Sun Jian's death in the early 190s, he and his family lived at various cities on the lower Yangtze, until Sun Ce carved out a warlord regime in the Jiangdong region, based on his own followers and a number of local clan allegiances. When Sun Ce was assassinated by the retainers of Xu Gong in 200, the 18-year-old Sun Quan inherited the lands southeast of the Yangtze River from his brother. His administration proved to be relatively stable in those early years as Sun Jian and Sun Ce's most senior officers, such as Zhou Yu, Zhang Zhao, Zhang Hong, and Cheng Pu supported the succession. Thus throughout the 200s, Sun Quan, under the tutelage of his able advisers, continued to build up his strength along the Yangtze River. In early 208, his forces finally won complete victory over Huang Zu, a military leader under Liu Biao, who dominated the middle Yangtze. Huang Zu was killed in battle.

Wuyue culture (simplified Chinese: 吴越文化; traditional Chinese: 吳越文化; pinyin: WúYuè wénhuà) refers to the regional Chinese culture of the Wuyue people, a Han Chinese subgroup primarily located in the Jiangnan region. The Wuyue cultural area, centered on the Taihu Lake basin, roughly corresponds to present-day southern Jiangsu, Zhejiang Province, and Shanghai. Wuyue culture is often divided into two regional variants: "Wu culture" and "Yue culture."

Closely linked to the Wu language, Wuyue culture began developing during the Zhou Dynasty and later absorbed influences from northern cultures during the Jin Dynasty. By the Tang Dynasty, the Wuyue economy had begun to surpass that of the northern China, further extending its cultural influence. While northern Han culture was reshaped by prolonged conflicts and periods of non-Han governance, Wuyue culture preserved many elements of earlier traditional Chinese culture.